如何在Flurl中添加内容标题

Question

Public Async Function UploadFile(folder As String, filepath As String) As Task(Of Boolean) Implements ICloud.UploadFile
        Dim data As Byte() = File.ReadAllBytes(filepath)
        Dim uploadurl As String = "drive/items/" + folder + ":/" + Path.GetFileName(filepath) + ":/" + "content?access_token=" + Token.access_token


        Using client As New HttpClient()
            client.BaseAddress = New Uri(ApiUrl)

            Dim request As HttpRequestMessage = New HttpRequestMessage(HttpMethod.Put, uploadurl)

            request.Content = New ByteArrayContent(data)
            request.Content.Headers.Add("Content-Type", "application/octet-stream")
            request.Content.Headers.Add("Content-Length", data.Length)

            Dim response = Await client.SendAsync(request)

            Return response.IsSuccessStatusCode
        End Using
    End Function

我已经尝试了Flurl的常规PutJsonAsync方法，但没有成功。这是我的代码中唯一的非flurl部分。

事先Thanx。

Answer 1

这里真正的问题是，目前在Flurl中没有对发送流或字节数组的开箱即用支持。我计划很快添加一些，但是根据您已经拥有的实现细节，很容易通过扩展方法自己添加这些。（原谅C#，希望你能翻译成VB。）

public static Task<HttpResponseMessage> PutFileAsync(this FlurlClient client, string filepath) 
{
    var data = File.ReadAllBytes(filepath);
    var content = new ByteArrayContent(data);
    content.Headers.Add("Content-Type", "application/octet-stream");
    content.Headers.Add("Content-Length", data.Length);
    return client.SendAsync(HttpMethod.Put, content: content);
}

如果您已经有flurlclient，那么上面的方法就可以工作，但是正如文档所描述的，最好有相应的string和url扩展，它们可以委托给上面的方法：

public static Task<HttpResponseMessage> PutFileAsync(this Url url, string filepath)
{
    return new FlurlClient(url).PutFileAsync(filepath);
}

public static Task<HttpResponseMessage> PutFileAsync(this string url, string filepath)
{
    return new FlurlClient(url).PutFileAsync(filepath);
}

把它们放在一个静态帮助器类中，它们应该可以与Flurl无缝地工作：

await uploadurl.PutFileAsync(filepath)